LIVING BODY DETECTION METHOD AND DEVICE

A living body detection method, comprising: acquiring a plurality of facial spectral images (S101); acquiring target feature regions and reference feature regions in the plurality of facial spectral images (S102); calculating the ratio of a first grayscale value of the target feature regions to a second grayscale value of the reference feature regions, so as to obtain a target grayscale value ratio (S103); matching the target grayscale value ratio with a preset grayscale value ratio (S104); and if the matching is successful, determining that the face in the facial spectral images is the face of a living body (S105). By means of the method, it is not necessary to use an active light source and a spectrograph to realize multispectral face-based living body detection, no visible light is required, and the living body detection is not affected by ambient light. The influence of complex and changeable ambient light can be prevented, thereby improving the precision of living body detection, and the high integrity,